Can yall help me lol

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost

What is the slope of the line that contains the points (-5, 6) and (14. - 7)?

The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase